Some visitors paid a total of $158 for entrance tickets to a theme park. The entrance ticket for a child cost $2. The entrance ticket for an adult cost 2 times as much. If there were 17 more adults than children, how many of the visitors were
- children?
- adults?
|
Adults |
Children |
Total |
Number |
1 u + 17 |
1 u |
|
Value |
$4 |
$2 |
|
Total value |
4 u + 68 |
2 u |
$158 |
(a)
Cost of an adult ticket
= 2 x 2
= $4
Cost of all the adult tickets
= 4(1 u + 17)
= 4 u + 68
Total cost of the tickets
= 4 u + 68 + 2 u
= 6 u + 68
6 u + 68 = 158
6 u = 158 - 68
6 u = 90
1 u = 90 ÷ 6 = 15
Total number of children
= 1 u
= 15
(b)
Total number of adults
= 1 u + 17
= 15 + 17
= 32
Answer(s): (a) 15; (b) 32